Hips are the engine of the golf swing. Proper use of the hips maximizes the distance you achieve regardless of your skill level. Pros know how far and how fast to rotate them to get maximum distance. With the Hip-X Golf swing analysis app from Ancor Labs, so can you! Hip-X Golf is the first app to utilize the iPhone's in-built motion sensors to analyze your swing. All you need is your iPhone 4, iPhone 4S, iPhone 5 or 4th/5th...